The recent court ruling giving the United States a win in a tussle for control of the Panama Canal is expected to prove an important “test case” for how China responds to the challenge to its interests and influence across Latin America. Analysts said there were a range of tools it could use, including diplomatic pressure on Panama, using its economic might to seek support from friendly countries and backing a legal challenge to the ruling. Last week, Panama’s Supreme Court voided a 25-year...